Complete the sentence, using the correct tense of the verb in bracket: "Khang looked pale when he arrived for the exam. He had studied_____ hard."

Women/ be/ hard-working/ than/ men/ although/ they/ be/ physically weaker.

The Royal National Park/ New South Wales, Australia

 United States is aimed at develop friendly relations among nations based on respect for the principle of equal rights and self-determination of people.

 the U.S population / grow / 250 million / 1991

Each of the beautiful cars in the shop was quickly sold to their owner

The prices of the services/ reasonable/ every pocket

My fellow peasant chatted to me the whole afternoon.

I’ll make some sandwiches before, I’ll leave for the office in the morning.

Mrs. Loan, along with her talented students, are going to be on the summer camp to USA.

They usually took a tree back with them and put it on the centre of the village.

 Kate will come back home after she had finished the last semester.

Nomadic hunter and gatherer societies have access to only a limited amount of food in an area and moved on when they have exhausted each locality

yesterday/ I/ go/ Thanh Ba Post Office/ send some money/ brother

Short-wave radios that can receive and transmit signals are used by pilots, the police, and amateur operator 

Archeological studies have provided evidence that the use of plants for decoration as well as for food developed early in the history 

 In order/ not/ have/ any/ digestive disease, you/ should/ eat/ healthily

The Maelstrom is a swift and danger current in the Arctic Ocean.

 Thanks to technical advancements, we are having a more convenient life.

Canada is made up of ten provinces and two territories, with governmental powers being divided between the federal government or the provinces.

Geologists find it useful to identification fossils in a rock samplebecause certain assemblages of species are characteristic of specific geologic time periods.